SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Changxin Huangfu,Yu Zhang,Minseok Jang,Liang Feng
Cu 2+ , Fe 2+ and free chlorine are three important analytes in drinking water. Firstly, the μPAD for single analyte was easily fabricated. Detection limits for Cu 2+ , Fe 2+ and free chlorine were 0.1 mg L −1 , 0.1 mg L −1 and 0.2 mg L −1 , respectively, less or equal to each Chinese Drinking Water Standard concentration and lower than those of most commercially available testing strips. Another μPAD with two layers was then developed to monitor and report the safety level of these three analytes in drinking water simultaneously. Moreover, the μPADs for Fe 2+ and free chlorine provided more distinguishable colors to users with naked eyes. The as-fabricated μPAD not only demonstrated excellent anti-interference capability, production reproducibility, but also exhibited good applicability for real use in different kinds of drinking water.
研究领域:
环境科学
·
分析化学
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DOI
高影响因子
ACS Omega
·
2023
·
IF 4.1
Yujie Song,Xiao Xie,Yang Liu,Zhen Zhu,Litao Sun
Metal ions are indispensable constituent elements of the human body, among which Cu2+ plays an important role in various biochemical reactions in the human body and is an essential element for maintaining human health. Studying the interaction between Cu2+ and DNA can be helpful to further understand the mechanism of Cu2+ behavior in organisms. In this paper, we investigated the DNA–Cu2+ complex by transmission electron microscopy (TEM) and used in situ liquid-cell TEM to observe the dynamic processes of interactions between DNA and Cu2+. Results show that the binding of Cu2+ to DNA leads to the bending of the DNA strand and provides an anchor site for activating Cu2+ for the nucleation and growth of copper crystals. Bound by the DNA strand, the copper crystals are arranged along the curved strand, showing the same arrangement pattern as guanine on the DNA sequence. It is believed that the study will further elaborate the interaction mechanism by directly observing the DNA–Cu2+ complex at the nanometer scale and benefit the related biomedical research studies.
研究领域:
生物物理学
·
纳米生物学
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医学研究
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产品关联
DOI
PubMed
高影响因子
Coatings
·
2024
·Vol. 14
·期 12
·1524
·
IF 2.9
Jiayuan Yang,Jixing Cui,Haiping Zhang,Hui Zhang,Jesse Zhu
Antibacterial powder coatings have attracted increasing attention with the awakening of people’s health awareness. Silver antibacterial agent has been widely used in coating system due to its superior stability and durability. However, silver ions have the problems of excessive release rate and the tendency to cause yellowing of the coating film. The addition of Cu2+and Zn2+can effectively alleviate these two phenomena. In this paper, the ternary exchange kinetics of Ag+, Cu2+, and Zn2+were studied to provide a theoretical basis for the synthesis of LTA-Ag-Cu-Zn. The reaction kinetics study shows that the selectivity and the adsorption capacity of LTA to Ag+is higher than that of Cu2+and Zn2+. The thermodynamic analysis discovers that LTA has the highest selectivity for Ag+, and the exchange between the two is spontaneous. In contrast, the selectivity of LTA to Cu2+and Zn2+is concentration-dependent. By establishing the three-ion competitive adsorption curve, it is found that the selectivity of Ag+is the highest, and the selectivity of copper and zinc is similar. These trends result from Ag+ions’ low hydration energy, small hydration radius, and strong electronegativity. This research lays the groundwork for developing high-performance LTA-Ag-Cu-Zn tri-ion exchange antibacterial agents.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 8
·1-8
·
IF 5.833
Hu Cong Yi,Jiang Zhong Wei,Huang Cheng Zhi,Li Yuan Fang
Based on the laccase-mimicking activity of Cu 2+ -modified University of Oslo (UiO) metal–organic framework (UiO-67-Cu 2+ ), we developed a colorimetric sensor array for distinguishing a series of phenols with different number and position of substituted hydroxyl group (-OH) and different substituent group on the benzene ring, including phenol, catechol, quinol, resorcinol, pyrogallol, phloroglucinol, o -chlorophenol, o -aminophenol, and o -nitrophenol. The highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels of phenolic compounds were obtained by theoretical calculation. The results show that the lower the LUMO energy level, the easier the chromogenic reaction occurs. The UiO-67-Cu 2+ -catalyzed phenol chromogenic reaction showed a good linearity in the range from 0.1 to 200 μM with limit of detection approximately 61 nM. Through the detection of phenol in tap water and river water, the recovery rate and RSD ( n = 3) were calculated as 94.1~103% and 1.0~3.3, respectively, showing good recovery, reliable results, and outstanding stability. Therefore, the proposed colorimetric sensor array will have a great potential for the detection of phenols in the environment. Graphical abstract
Schematic presentation of a simple and sensitive colorimetric strategy based on the laccase-mimicking activity of Cu 2+ -modified UiO-type metal–organic framework (MOFs, Uio-67-Cu 2+ ) to distinguish phenols with analogous structures.
研究领域:
分析化学
·
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
NANO
·
2020
·
IF 1.566
Dan Wang,Xinfeng Xiao,Bo Han,Weiming Ni,Yu Gao,Lin Li,Jianliang Xue
A series of UiO-66-PEI materials were obtained by impregnating UiO-66 with different amounts of polyethylenimine (PEI) with UiO-66 as the basic skeleton material. The materials were used as adsorbents to remove Ni 2 + and Cu 2 + from water. The prepared UiO-66-PEI-30 had good adsorption capacity on Ni 2 + and Cu 2 + at 30% PEI. The adsorption of Ni 2 + and Cu 2 + with UiO-66-PEI-30 was further studied. The role of eluent types, elution time, concentration and volume on the effect of Cu 2 + elution was investigated. The adsorption of Ni 2 + and Cu 2 + by UiO-66-PEI-30 followed the pseudo-second-order kinetic model and Langmuir adsorption model. The maximum adsorption capacities obtained by Langmuir fitting for Ni 2 + and Cu 2 + were 11.54 mg g − 1 and 24.87 mg g − 1 , respectively. After four desorption/adsorption experiments, UiO-66-PEI-30 still showed good adsorption performance. UiO-66 impregnated with PEI was an adsorbent with adsorption potential.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Lu Qin,Jianjian Zhong,Jianling Li
A prominent topic in related fields is the search for cathode materials for aluminum-ion batteries (AIBs) with high specific capacity and outstanding cycle performance. MXenes, a two-dimensional layered material, can be used for a variety of energy storage purposes. However, their application in AIBs is hampered by poor capacity and significant self-accumulation. In this study, we employ a simple two-step process, first electrostatically adsorbing Cu2+ on MXenes and then in situ selenizing MXenes layers to produce TiSe2. The composite product F-Ti3C2Tx@Cu@TiSe2 exhibits an initial discharge specific capacity of 360.3 mAh g–1, and the capacity remains at 267.5 mAh g–1 after 100 cycles. In contrast, the directly selenized F-Ti3C2Tx@TiSe2 without Cu2+ shows a capacity of just 77.2 mAh g–1 after 100 cycles. This huge improvement is due to the fact that the electrostatic adsorption of Cu2+ on MXenes induces polarized sites with high electron density and optimizes the spatial structure of MXenes. This phenomenon effectively alleviates self-accumulation, providing a larger specific surface area and making it easier for [AlCl4]− to embed and escape. Through the X-ray photoelectron spectroscopy test and charge and discharge curves, it is found that the main capacity of the material comes from the redox reaction of [AlCl4]− and selenides in AIBs. Herein, the utilization of Cu2+ adsorbed MXenes as precursors followed by in situ selenization is innovative and also validates the great potential of Cu2+ adsorption in the field of electrochemistry.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
Progress in Natural Science-Materials International
·
2023
·
IF 4.7
Haiyan Kang,Hongchao Geng,Sisi Shi,Zhongxian Song,Yuting Dong,Xiaole Yan,Chaohai Wang,Yanli Mao,Qingyun Cai
High concentrations of Cu 2+ exceeding what the required level for the cellular process can changes the properties of protein, affects the normal function of the body, but also affect the body's metabolism, so that the body's immunity appears to decline. Detection of Cu 2+ is important for the environmental monitoring. Here, a fluorescence probe that uses heavy metal-free and properties-superior CuInS 2 /ZnS was proposed for detection of Cu 2+ . The fluorescence intensity of CuInS 2 /ZnS quantum dots (QDs) decreased obviously after Cu 2+ were added, and the intensity with the concentration of Cu 2+ showed excellent linear relation within the scope of 0–50 μM, the LOD down to 0.45 μM, a possible detection mechanism was analyzed. The QDs was further applied to the detection of Cu 2+ in drinking water, manifesting the foreground of the current strategy.
研究领域:
生物化学
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环境科学
·
分析化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lei Wang,Ning Zhao,Changrui Zhu,Lei Chen,Yang Jiang,Rulong Zhou,Yanfang Liu,Bingyan Qu,Hubertus T. Hintzen
In the field of solid-state luminescence, Cu 2+ has long been widely acknowledged for its capacity to emit infrared light. However, the occurrence of visible emission from Cu 2+ ions had been infrequently observed and reported. In this study, we made an intriguing discovery by examining the behavior of Cu 2+ within an irregular coordination environment of Ba in BaGa 2 O 4 . When excited by UV light, Cu 2+ unexpectedly gave a vibrant yellow–red emission, covering a wavelength range spanning from 500 to 750 nm. More noteworthy, by simply manipulating the excitation wavelength or adjusting the temperature, the peak wavelength of the emission could be effectively tuned from approximately 600 to 660 nm, which could be attributed to the luminescence nature of the charge transfer (CT) between O 2− and Cu 2+ . Moreover, the phosphor material displayed a remarkable persistent luminescence (PerL) lasting up to 12 h after UV light excitation. Through thermoluminescence (TL) measurements and first-principle calculations, we found that the intrinsic defects, such as vacancies of oxygen and gallium (V O and V Ga ″ ), played important roles for the PerL phenomena. These findings highlighted the exceptional tunability and PerL properties of BaGa 2 O 4 :Cu 2+ . Our study provided a new potential guideline for the design of Cu 2+ -activated phosphors in visible region, and opened up new avenues for the research in related functional luminescence materials.
研究领域:
材料科学
·
光学
·
固体物理
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产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2018
·Vol. 20
·期 41
·6565-6572
·
IF 3.304
Jiani Gu,Yi Xie,Wenhui Chen,Chao Hu,Fen Qiao,Zhiyuan Xu,Xiaoqing Liu,Xiujian Zhao,Gaoke Zhang
We report inter-diffusion of as-synthesized covellite CuS nanocrystals (NCs) with Cu2+ cations at room temperature in the presence of a mild reducing agent (i.e., ascorbic acid). Unlike the previously-reported incorporation of Cu+ or Cu2+ ions with CuS that generates homogenous Cu2−xS NCs, the controlled diffusion of Cu2+ ions into the CuS NCs allows the formation of a unique CuS@Cu2−xS core–shell-like nanostructure as the intermediate and Cu2S NCs in the presence of excess Cu2+ ions. The CuS@Cu2−xS core–shell nanostructure can evolve into homogenous Cu2−xS NCs by further cation diffusion from the Cu2−xS shell toward the center (i.e. the CuS core) under E-beam irradiation during TEM test or when the core–shell NCs are stored in toluene for some time (e.g. four weeks). Notably, the CuS/paraffin composite with filler loading of 50 wt% and thickness of 1.95 mm displays a minimum reflection loss (RL) of −54.84 dB at 12.6 GHz. By adjusting the thickness in the range of 1–5 mm, the effective absorption bandwidth (below −10 dB, 90% microwave absorption) could reach 15 GHz (3–18 GHz). In particular, the diffusion of Cu2+ into CuS NCs leads to dampening of the NIR plasmon absorbance and a decrease in free carrier (i.e., hole) density and conductivity, which accounts for the confinement effect on the microwave absorption properties of the resulting samples.
研究领域:
材料科学
·
纳米技术
·
电磁材料
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Xianfa Zhang,Shuaibing Yu,Xuliang Pang,Xiaochen Ren,Bo Zhang,Jinming Kong,Lianzhi Li
A solvent-directed, new Schiff base multiple correspondence fluorescent probe, (E)-2-(2-hydroxybenzylidene) hydrazine-1-carboxamid (L), was synthesized for selective sensing of Cu 2+ and Mg 2+ ions. L showed excellent selectivity and high sensitivity toward Cu 2+ in “turn off” mode with a detection limit of 40.5 nM in 10 mM, pH = 7.0 PBS buffer. Contrary to that, when acetonitrile was used as the solvent, L exhibited highly selective and sensitive fluorescence sensing ability for Mg 2+ in “turn on” mode with a detection limit of 9.5 nM. L can coordinate to Cu 2+ and Mg 2+ in a 1:1 molar ratio, respectively, evidenced by Job’s plot analysis. Their binding modes were investigated by NMR, IR and XPS spectroscopies. Moreover, the satisfied results were obtained when L was used to detect Cu 2+ and Mg 2+ in real water samples.
研究领域:
分析化学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 15
·7278-7287
·
IF 3.3
Jie Zhang,Xuemeng Tian,Chaochao Dong,Ruixia Gao,Yuan Hu
There is a growing awareness of practices focused on the in-depth treatment and decontamination processes of firefighters’ personal protective equipment to decrease health risks. Hence, TiO2-nanoparticle-modified Cu-doped BiOBr microflowers (BiOBr–Cu2+/TiO2) have been devised and used as effective constituents to construct a type of decontamination agent that can efficiently and deeply eliminate hazardous chemicals. The 3D microflowers can be admirable carriers for the prevention of aggregation and outstanding adsorption, and the construction of a heterojunction based on the copper-doping strategy and sequential harvesting of light strategy provides enhanced light absorbance and efficient charge separation. The proposed materials have a nanoparticle-interspersed microflower morphology, enhanced light-harvesting ability, and excellent transfer of photogenerated carriers, leading to more effective adsorption and solar-light-driven photocatalytic activity than other catalysts. Moreover, the BiOBr–Cu2+/TiO2 composites mixed with different solvents can be used as decontamination agents for the in-depth treatment of hazardous chemicals under different situations. It is believed that employing heterojunctions as the constituents of decontamination agents has promise to become an effective and feasible method for deep decontamination processes in firefighting work.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Qian Wang,Xue Zhu,Xinglin Li,Lin Chen,Hengyang Mao,Xiaoshan Meng,Taoli Huhe,Zhengzhong Zhou
Membrane separation technology with high separation efficiency and low energy consumption are one of the keys to tackle the water-energy crisis. However, membrane fouling can reduce membrane life and performance, limiting its application. In this work, hydrophilic modifier sodium lignosulphonate (SLS) and antibacterial agent CuCl 2 were adopted as additives to modify PVDF membranes. The addition of SLS can optimize the structure of PVDF membranes and increase hydrophilicity, enhancing separation and anti-fouling performance. Moreover, the SLS can fix Cu 2+ effectively onto the membrane for improved antibacterial performance, as the leakage of Cu 2+ is reduced greatly, compared to Cu-PVDF membranes without SLS. The simulation based on density functional theory proved that the binding energy of SLS and Cu 2+ is 2.7 times of that of PVDF and Cu 2+ . Finally, the prepared anti-fouling Cu-SLS/PVDF membrane was applied in the separation of simulated Escherichia coli fermentation broth, exhibiting long-term antibacterial and anti-fouling property. This work provides a new idea for the preparation of long-term anti-fouling and antibacterial membrane, and has good potential in the recovery of fermentation broth.
研究领域:
环境科学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）